Extended Frenkel excitons in one-dimensi
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T. Hibma; G.A. Sawatzky; J. Kommandeur
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Article
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1973
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Elsevier Science
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English
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A model is developed for cscitons in a linear chnin of dimers of radical ions in the rcgon intermediate between the nearly free-electron limit 2nd the localized-electron limit. When only on site electron-hole intcraclions are taken into occounr, an extended cxciron state results, which in the limit